Go Back  CorvetteForum - Chevrolet Corvette Forum Discussion > C5 Corvettes, 1997 - 2004 > C5 Forced Induction/Nitrous
Reload this Page >

CTS-V A/C compressor swap--aftermarket engine mounts required?

C5 Forced Induction/Nitrous C5 Corvette Turbochargers, Superchargers, Centrifugal, Twin Screw & Roots Blowers, Twin Turbo Kits, Intercoolers, Wet & Dry Nitrous Injection, Meth
Sponsored by:
Sponsored by:

CTS-V A/C compressor swap--aftermarket engine mounts required?

 
Old 04-07-2016, 01:18 PM
  #1  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default CTS-V A/C compressor swap--aftermarket engine mounts required?

I'm working on swapping to a CTS-V A/C compressor for my twin turbo build, but have found that the V compressor bracket has a major interference problem with the OEM engine mount. It looks like I'd have to remove a big chunk of the lower left compressor bolt mounting boss from the bracket to make it fit. I'd probably only be able to mount the compressor with 3 bolts if I did that.

I've seen that JDS99 and jimbos'ss on this forum have both done CTS-V A/C compressor swaps on their twin turbo cars. Were both of you guys running aftermarket mounts? It looks like a smaller diameter mount, like Hinson's, would solve the problem.
TastyBacon is offline  
Old 04-07-2016, 02:07 PM
  #2  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

There is a drain on the back side of the compressor at about the 11 o'clock position that contacts the motor mount.


This shows the area that needed to be removed on the motor mount.


Removed a little from the boss area of the compressor near the oil fill/drain.
Turbo-Geist is offline  
Old 04-07-2016, 03:02 PM
  #3  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default



Yep, already got that bracket notched while the motor was out of the car. The issue I'm having now is that with the engine in the car, the bottom left corner of the compressor bracket is hitting the engine mount itself.

Last edited by TastyBacon; 04-07-2016 at 03:04 PM.
TastyBacon is offline  
Old 04-07-2016, 04:01 PM
  #4  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

I'm running the Pfadt engine mounts.
Turbo-Geist is offline  
Old 04-07-2016, 11:42 PM
  #5  
JDS99
CF Senior Member
Support Corvetteforum!
 
JDS99's Avatar
 
Member Since: May 2011
Location: Houston Texas
Posts: 1,208
Likes: 0
Liked 49 Times in 32 Posts
Default

Yes, I have hinson mounts on mine . Jim kept the stock mounts on his and just hot knifed it to get the clearance. Ben's pfadt mounts are so small in comparison, it's a non-issue with them.

If mounts are in the budget, I would strongly suggest at least putting a set of hinson mounts in to help stabilize the engine. I'm not a fan of how much the engine moves with the stock rubbers.

Quick tip.. polarity does matter on the clutch harness or you'll pop the coil as soon as it gets power. Make sure you go green-green
JDS99 is offline  
Old 04-08-2016, 12:23 PM
  #6  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

Hinson mounts could certainly be in the budget, but I hate NVH (one of the reasons I chose FI over H+C) and I don't drag race, so I'd like to stick with the my stock mounts if possible. I replaced them two years ago and they're in good shape. I'm a little afraid to cut into the steel on the top of the mount, because I'm not sure how deep I can go, but it's good to hear that it can be done. Maybe I'll give it a shot this weekend.

Thanks for the tip on the wiring!
TastyBacon is offline  
Old 04-08-2016, 03:41 PM
  #7  
jimbos'ss
CF Senior Member
 
jimbos'ss's Avatar
 
Member Since: Aug 2010
Location: killeen TX
Posts: 743
Liked 34 Times in 34 Posts
Default

I don't have any pics, but I had to clearance the compressors lower rear bolt hole and that section of the bracket to make it work with the stock mounts. I took off a ton of material to make it work and the lower rear bolt didn't get used at all.
jimbos'ss is offline  
The following users liked this post: jimbos'ss
TastyBacon (04-08-2016)
Old 04-08-2016, 04:23 PM
  #8  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

Thanks! That's what I was figuring I would have to do as well. Still plenty secure with 3 bolts? Seems like it would be okay.
TastyBacon is offline  
Old 04-08-2016, 06:14 PM
  #9  
jimbos'ss
CF Senior Member
 
jimbos'ss's Avatar
 
Member Since: Aug 2010
Location: killeen TX
Posts: 743
Liked 34 Times in 34 Posts
Default

Yeah no issues so far.
jimbos'ss is offline  
Old 04-09-2016, 06:55 PM
  #10  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

Well, the deed is done. Jim wasn't exaggerating when he said a ton of material had to be removed. Once I started cutting and test-fitting, it was clear that my goal was going to be to remove all evidence of the 4th compressor mounting point, both from the bracket and the compressor. Now it fits great, and I can move on to getting the lines run and wrapping up the A/C system. Thanks for the help, everyone!






Last edited by TastyBacon; 04-09-2016 at 06:57 PM.
TastyBacon is offline  
Old 04-10-2016, 07:01 AM
  #11  
StealthFRC
CF Senior Member
 
Member Since: Jun 2011
Location: VERNON CT
Posts: 2,262
Liked 43 Times in 36 Posts
Default

With Hinson mounts and an ls2 I didn't have to clearance anything.
StealthFRC is offline  
Old 04-11-2016, 12:49 AM
  #12  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

I also beveled the cradle for the bottom bolt heads. You'll only have to do one since you removed one of the bottom ones. I had a little trouble getting the bolt to go in straight if the top ones were installed to "hang" the assembly. Yours may be fine.
Turbo-Geist is offline  
Old 04-11-2016, 06:23 PM
  #13  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

I was able to mount the compressor without clearancing the cradle at all. It looks great; there's a ton of room around there now! I got my high side line figured out, the only thing I have left to figure out is how to attach the low side line to the "peanut" shaped flange on the receiver/dryer. I was hoping I could do it all with off-the-shelf parts, but unless I can find an adapter from the peanut flange to a standard #10 threaded fitting, I might just end up cutting the flange off the OEM line and paying someone to TIG a beadlock hose end onto it.
TastyBacon is offline  
Old 04-11-2016, 06:46 PM
  #14  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

There are adaptors available. I'll take a picture of the one I'm using when I get to the house.
Turbo-Geist is offline  
Old 04-12-2016, 06:06 PM
  #15  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

Looking for something like this?


Turbo-Geist is offline  
The following users liked this post: Turbo-Geist
TastyBacon (03-28-2018)
Old 04-12-2016, 11:58 PM
  #16  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

Hmm, that looks like it would work. Are you using a washer on the bolt to take up that gap, or is it just not seated all the way?
TastyBacon is offline  
Old 04-13-2016, 07:08 AM
  #17  
Turbo-Geist
CF Senior Member
 
Turbo-Geist's Avatar
 
Member Since: Jul 2008
Location: Houston Texas
Posts: 2,892
Liked 118 Times in 106 Posts
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Default

There's a washer and an o-ring. The assembly hasn't been tightened yet. I'm waiting on a new accumulator.
Turbo-Geist is offline  
Old 12-15-2017, 07:39 PM
  #18  
Merc Man
Junior Member
 
Member Since: Dec 2017
Posts: 1
Likes: 0
Liked 0 Times in 0 Posts
Default LSA - CTS V AC Compressor and Mounting Bracket new.

I have a new ac compressor and the mounting bracket for an LSA motor. It wouldn’t clear on my chevelle project so I had to buy a completely different front runner kit. The bracket has been clearanced to try to work but it didn’t. I think the kit was 345 plus shipping. Selling this kit for 250.00 with the belt.

Email [email protected] for anymore info.
Thanks, John
Merc Man is offline  
Old 03-28-2018, 06:44 PM
  #19  
TastyBacon
CF Senior Member
Thread Starter
 
Member Since: May 2013
Location: MN
Posts: 673
Liked 56 Times in 48 Posts
Default

Turbo-Geist how did that AP Air fitting end up working for you? Got a pic of it tightened down?
TastyBacon is offline  

Thread Tools
Search this Thread
Quick Reply: CTS-V A/C compressor swap--aftermarket engine mounts required?


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: